The order that froze trillions of dollars of federal grants and loans was published without vetting by key officials in the ...

A C-17 military aircraft landed at Tucson International Airport on Saturday afternoon, as cars and vans were seen entering ...

Silent Sky tells the story of pioneering astronomer Henrietta Swan Leavitt and explores a woman’s place in society during a time of immense scientific and heart-bound discoveries. A decade ...

The government is releasing photos and videos to promote President Trump’s immigration agenda, including footage of troops at ...

Hubble revealed a universe of galaxies that existed beyond ours — but he couldn't have done it without a little help.

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the ...

Pinpointing a Milepost Marker Star that Opened the Realm of Galaxies At the dawn of the 20th century, astronomers faced a ...

Out: The New York Times, NBC News, National Public Radio, and Politico. In: New York Post, One America News Network, Breitbart News Network, and HuffPost.

There are no tape-measures in space, but by the early 20th century Henrietta Swan Leavitt had discovered that the pulsation period of Cepheid variables is directly tied to their luminosity.